If you are looking for something other than movies or tv. . . then no. (Movies and TV is kinda the whole point of the Apple TV. . .)
Frankly it is getting less and less worthwhile to jailbreak even for movies and TV, as certain services become unusable. I never used Icefilms, but last I heard it was no longer working. (per this thread:
https://forums.macrumors.com/showthre...light=icefilms ).
Also the Amazon Instant Streaming plugin for XBMC stopped working earlier this year. People came up with a workaround so that XBMC would instead pop open a web browser, but that workaround only works on macs/pc's, not Apple TVs.
http://forum.xbmc.org/showthread.php?tid=108124&page=94 . Of course, nowadays you can just stream Amazon Instant Streaming to your iOS device and then airplay to your Apple TV, so this isn't too big a loss, but it's still one less reason to jailbreak.
The only plugins I've been using consistently have been Bluecop's Hulu plugin (mentioned earlier) and the "Free Cable" plugin. The latter just gives you access to those shows where the network posts a streaming version of their show on the network website. So, if CBS posts the most recent episode of "How I met your mother" on CBS.com to be viewed in browsers, that means the "Free Cable" plugin can stream that same episode directly via XBMC on your Apple TV.
With those two plugins, the jailbreak basically serves as a "backup" option for streaming shows that my EyeTV/Antenna system misses. If it's on Hulu or a network website, it's available to stream on my Apple TV. If you are interested in sports, there are some ESPN3 plugins that I'm told work pretty well, but I don't watch sports so I've never bothered trying those plugins.
I use the jailbroken features above maybe once every 2 or three weeks if for some reason we miss an episode. My wife used to use it for the cable channel shows like project runway, but for some reason that wouldn't stream reliably via Free Cable, so she just ends up watching it on her iPad. She could airplay it, but she doesn't bother.
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Btw, there is a working jailbreak for the ATV3 now.
Uh what now?
Are you talking about the Plexconnect/Trailers app hack, or do you mean an actual jailbreak?